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Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7461551 | Window fog detecting apparatus A window fog detecting apparatus has an optical type fog detecting sensor for optically detecting fog occurring at a window glass, a humidity sensor for detecting a relative humidity of air at an interior side of the window glass, and a sensor output correcting unit... | 12/09/2008 |
| 7339178 | Device for the photometric measurement of the content of a chemical substance in an analyte A device for photometric measurement of the concentration of a chemical substance in a solution, including: a lamp, which emits electromagnetic radiation in a predetermined wavelength range; a first receiving unit in a measuring branch (MB), which receives the radia... | 03/04/2008 |
| 7339168 | System and method for detecting water vapor within natural gas A system and method are disclosed for the detection of water vapor in a natural gas background. The system includes a light source operating in a wavelength range such as, 1.877-1.901 μm, 2.711-2.786 μm, or 920-960 nm, passes through the natural gas to be detected... | 03/04/2008 |
| 7260507 | Method for improving the performance accuracy in differential absorption lidar for oil and gas pipeline leak detection and quantification An improved method for determining whether a measurement point, measured using a differential absorption LIDAR (DIAL) system, represents a plume point or a non-plume point. Concentration path lengths (CPL's) for a plurality of measurement points are determined. An a... | 08/21/2007 |
| 7236249 | Rain sensor A rain sensor, for motor vehicles in particular, having one measuring distance with at least one transmitter and at least one receiver for electromagnetic waves (light waves), a windshield being arranged in the measuring distance, and the measuring distance influenc... | 06/26/2007 |
| 7213534 | Device and method for detection/indication of liquid leakage An improved device for the detection of leakage is achieved when the device includes at least two components, of which at least one is capable of migrating with the liquid within the carrier, and forming a distinct color or other detectable signal with the first com... | 05/08/2007 |
| 7191643 | Sensor system to distinguish frozen and non-frozen liquid particulates A sensor system comprises a first sensor, a second sensor, and circuitry. The first sensor collects non-frozen liquid with a first collection efficiency, but does not collect frozen liquid. The second sensor collects non-frozen liquid with a second collection effici... | 03/20/2007 |
| 7168316 | Humidity meter with non-contact temperature measurement A humidity meter with non-contact temperature measurement capability, including a humidity meter contained at least partially in a housing and having outputs relating to measured humidity parameters including humidity and ambient temperature, an output display conta... | 01/30/2007 |
| 7034699 | Rain sensor, especially for a motor vehicle A rain sensor, particularly for a motor vehicle, includes a light-conducting member arranged in an intermediate layer of a glass, and is designed as an optically closed system. ... | 04/25/2006 |
| 7005662 | Soil water potential detector The present invention related to a water detector for use in determining the presence of sufficient water in irrigation systems and plant cultures in general. The detector includes a probe and the presence of water in a soil induces modifications in the optical prop... | 02/28/2006 |
| 6972142 | Card having multiple layers indicating relative humidity A multi-layered card having a thin, flexible, non-moisture absorbable, printable first layer, a first high tack adhesive second layer on a back side of the first layer joining the first layer to a front face of a third layer of a moisture absorbable card stock. A ba... | 12/06/2005 |
| 6947138 | Optical sensor system and method for detection of hydrides and acid gases A gas sensor for detection of hydride and/or acid gas species, featuring a color changing material that changes color in exposure to hydride and/or acid gas species, component(s) for impinging radiation on the color changing material for reflection therefrom, and co... | 09/20/2005 |
| 6938482 | Humidity sensor element containing polyphenylsulfone A humidity sensor element for a humidity sensing device includes a rigid, p doped silicon substrate, a non-porous terminal on one side of the substrate, a porous terminal on a second side of the substrate, and a layer of polyphenylsulfone between the porous terminal... | 09/06/2005 |
| 6936827 | Detecting device for fluorescent-labeled material A fluorochrome-marked sample is excited with the proper wattage and wavelength of light using an exciter or bandpass filter and beamsplitting mirror device. This causes the sample to emit light of a slightly higher wavelength than that of excitation. A subsequent ba... | 08/30/2005 |
| 6926439 | Dew point hygrometers and dew sensors A dew point hygrometer for determining the dew point of a gas in which a displaceable transparent film is in contact with the gas and forms a condensation surface. The film is placed on a temperature control device controlling its temperature and an optic fiber, emi... | 08/09/2005 |
| 6881585 | Method and apparatus for rapid screening of volatiles In one embodiment, the present method includes the steps of introducing a volume of a sample into a vapor delivery line and volatilizing at least a portion of the volume as it is carried through the vapor delivery line. At least a portion of the volatilized volume c... | 04/19/2005 |
| 6833555 | Turbidity sensor having adapted transmission characteristic and method for fabrication thereof For adjusting output voltages of a turbidity sensor which is used for measuring the turbidity of a medium by means of a radiation at least partially propagating through the medium being emitted from a sender and being received by a receiver, ohmic loads for the rece... | 12/21/2004 |
| 6822742 | System and method for remote quantitative detection of fluid leaks from a natural gas or oil pipeline A system for remote quantitative detection of fluid leaks from a natural gas or oil pipeline by use of an airborne platform; including at least one laser light source for nearly simultaneous illuminating two or more target fluids and a background, wherein the two or... | 11/23/2004 |
| 6663679 | High intensity, non-reversing humidity indicator The invention is a device for monitoring humidity, comprising a first layer, which is a visual indicator, a second layer covering and obscuring the first layer, with the second layer comprising a deliquescent material. The deliquescent material picks up m... | 12/16/2003 |
| 6250134 | Apparatus for determining the dew-point and/or the content of vapor in the air The apparatus for determining the dew-point and/or the content of vapor in the air, particularly for the use in radio sondes, comprises a dew-point mirror assembly, including a source of light, a reflector, a cooling element thermally coupled to the refle... | 06/26/2001 |
| 6223543 | Effective temperature controller and method of effective temperature control A control system for a cooling system for reducing humidity levels in a gas such as ambient air is provided. The cooling unit includes at least one of a compressor and a chiller, and cooling coils are connected to the cooling unit. A fan blows the gas ont... | 05/01/2001 |
| 6212951 | Flow velocity measuring unit A Doppler flow velocity measuring unit wherein an optical unit including a laser and a photodetector is removably mounted on a pipeline is disclosed. The optical unit is attached to a pipe that is affixed to the pipeline at right angles to the flow in the... | 04/10/2001 |
| 6164817 | Fiber optic hygrometer apparatus and method A fiber optic hygrometer apparatus and method for sensing and measuring the dew point of an atmosphere is disclosed that includes a controller for controlling the operation of the apparatus and a first optical fiber for transmitting light energy from a so... | 12/26/2000 |
| 5920010 | Method of determining dew point and a suitable device The proposed method of determining dew point involves directing the gas under investigation onto a cooled section of an optically transparent body through which a luminous flux is allowed to pass and recording fluctuations in the intensity of the luminous... | 07/06/1999 |
| 5879943 | Humidity detection method A humidity detection material includes oxide of at least one metal selected from the group consisting of Mg, Ca, Mn, Fe, Co, Ni, and Cu. The metal oxide is preferably in the form of a porous material. The metal oxide is formed preferably in the form of a ... | 03/09/1999 |
| 5807525 | Apparatus and process for multi stage solid phase synthesis of long chained organic molecules An apparatus and process are disclosed for optimizing the repetitive steps in a solid-phase oligonucleotide synthesis by continuous optical scanning of the effluent stream from the reaction module and by computerized processing and implementation of the s... | 09/15/1998 |
| 5804719 | Laminated plate glass equipped with a sensor Laminated plate glass including at least one rigid sheet of glass (1, 2), at least one layer of plastic material (3), and a sensor (4) for the presence of foreign bodies on the outside of the plate glass. Its sensing side is held in close contact with the... | 09/08/1998 |
| 5783836 | Optical sensor apparatus for detecting vapor of organic solvent An optical sensor apparatus for detecting a vapor of an organic solvent is characterized by a simple structure which allows easy manufacture, high reliability, low cost, compactness in size, and portability. The optical sensor apparatus has a light source... | 07/21/1998 |
| 5676154 | Breathing sensor detecting breath condensation A method, a device and a sensor to sense the breathing of a man or an animal. A breathing sensor which, in an optical way, detects changes in deposited moisture on a sensor portion is placed in the breathing air flow, and changes of a transmitted or refle... | 10/14/1997 |
| 5560245 | Moisture activated wiper sensor A moisture activated wiper sensor has all necessary electronic and optical components for detecting moisture and performing signal processing in a single module which mounts to a vehicle windshield. The packaging of the optical components and associated e... | 10/01/1996 |
| 5440927 | Fiber optic moisture sensor This invention provides for a fiber optic moisture sensor. The sensor is comprised of a housing and a support positioned within the housing. The support is coated with a film. A first and second light guides are positioned within the housing and communica... | 08/15/1995 |
| 5319975 | Fiber optic moisture sensor This invention provides for a fiber optic moisture sensor. The sensor is comprised of a housing and a support positioned within the housing. The support is coated with a film. A first and second light guides are positioned within the housing and communica... | 06/14/1994 |
| 5270929 | Radio wave refractivity deduced from lidar measurements A high resolution lidar is used to backscatter light from atmospheric aerosols. The actual relative humidity is measured at altitudes corresponding to those from which the backscattered light occurs. A mathematical relationship between the two is then der... | 12/14/1993 |
| 5139344 | Method and apparatus for dew point determination A new method for determination of the dew-point of a humid gas by means of a light beam reflected by a dew-point mirror. During measurements of dew-points, particularly in the range between -50° C. to -95° C., excess moisture is added to the humid gas u... | 08/18/1992 |
| 5022045 | Optical-type, phase transition humidity-responsive devices The invention is directed to chemical compositions suitable for use in salt-solution transition temperature or hot mirror devices. It also provides methods of using these sensors (for the measurement of the humidity of gases) as well as the apparatus. The... | 06/04/1991 |
| 4894532 | Optical fiber sensor with light absorbing moisture-sensitive coating An optical fiber moisture sensor is prepared by coating an optical fiber with a thin film of plasma polymerized hexamethyldisiloxane and ammonia, approximately 1-2 μm thick. The light transmission characteristics of such a coated optical fiber change as ... | 01/16/1990 |
| 4890494 | Atmospheric sensor A device for measuring the liquid content of a gas, as for example measuring the liquid water content in the atmosphere. The device employs a probe fabricated in part from a material which is thermally self-stabilizing and which preferably has a positive ... | 01/02/1990 |
| 4854160 | Equilibrium and ambient relative humidity indicator A temperature and humidity indicator is provided by a plurality of liquid crystals sensitive to different temperatures which form a graduated scale and a plurality of paper segments impregnated with an inorganic salt sensitive to humidity forming a second... | 08/08/1989 |
| 4847512 | Method of measuring humidity by determining refractive index using dual optical paths Humidity is measured by alternatively producing two laser beams of different wavelengths at each of which the second differential derivative of the light absorption spectrum of water molecules is zero, dividing each laser beam, passing one divided beam al... | 07/11/1989 |
| 4762426 | Remote passive temperature sensor A remote passive condition sensor apparatus such as a temperature or humidity sensor apparatus. A corner cube reflector at a remote location, where it is not feasible to have electrical connections or batteries, receives and reflects back radiant energy t... | 08/09/1988 |
